EUVD-2026-56697
GHSA-q839-g6gr-9h5f
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Local vector with mandatory user interaction to open crafted document; no privileges required; read-only memory disclosure with no integrity or availability impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
3DescriptionCVE.org
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
AnalysisAI
Out-of-bounds read in Microsoft Office Word exposes potentially sensitive memory contents to local attackers when a victim opens a specially crafted document. Affected products span Microsoft Word 2016, Office 2019, Office LTSC 2021 and 2024, Office 365 for Mac, and Microsoft 365 Apps for Enterprise across both Windows and macOS platforms, with vendor-confirmed patches available. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must open a specially crafted Word document using a vulnerable version of Microsoft Office Word as listed in the affected products. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 3.1 scores this at 5.5 Medium with vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Word document engineered to trigger an out-of-bounds read in the document parser, then delivers it to a target via spearphishing email, a shared network drive, or a download link. When the victim opens the file in a vulnerable version of Microsoft Word, the parser reads beyond an allocated buffer boundary, leaking memory contents - potentially including in-process addresses or sensitive data - which could be used to inform further exploitation such as ASLR bypass. … |
| Remediation | The primary remediation is to apply the Microsoft-released patch. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Information Disclosure
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External POC / Exploit Code
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